*Heading AXISYMMETRIC TIRE-AIR INTERACTION *preprint,model=yes,HIST=yes *Node,NSET=AIR 1, 133.0795, 17.6441 2, 110., 15. 3, 110., 12.1921 4, 130.1377, 14.6759 5, 110., 0. 6, 132.1157, 0. 7, 138., 0. 8, 127.3517, 20.7936 9, 120.2127, 20.0649 10, 114.4098, 17.5867 11, 115.2976, 13.3767 12, 120.9509, 14.7701 13, 126.1478, 15.1039 14, 110., 8.45017 15, 110., 4.31845 16, 115.5341, 0. 17, 121.0336, 0. 18, 126.5221, 0. 19, 131.7998, 5.52873 20, 131.0783, 10.6922 21, 137.6025, 6.24966 22, 136.2247, 12.3881 23, 115.4284, 9.00797 24, 115.4874, 4.54216 25, 120.8794, 9.6991 26, 120.9465, 4.84614 27, 126.1228, 10.1596 28, 126.3478, 5.13363 *Element, type=ACAX4,ELSET=AIR 1, 1, 8, 13, 4 2, 8, 9, 12, 13 3, 9, 10, 11, 12 4, 10, 2, 3, 11 5, 3, 14, 23, 11 6, 14, 15, 24, 23 7, 15, 5, 16, 24 8, 11, 23, 25, 12 9, 23, 24, 26, 25 10, 24, 16, 17, 26 11, 12, 25, 27, 13 12, 25, 26, 28, 27 13, 26, 17, 18, 28 14, 13, 27, 20, 4 15, 27, 28, 19, 20 16, 28, 18, 6, 19 17, 6, 7, 21, 19 18, 19, 21, 22, 20 19, 20, 22, 1, 4 *Solid Section, elset=air, material=air 1., *Node,nset=tire 51, 136.4036, 11.889 52, 143.1992, 14.6474 53, 110., 20. 54, 110., 15. 55, 141., 0. 56, 138., 0. 57, 145., 0. 58, 139.674, 13.2026 59, 140.3605, 19.6142 60, 135.6735, 23.0525 61, 130.2496, 24.9445 62, 124.5124, 25.5826 63, 118.8792, 24.6712 64, 114.0135, 22.4476 65, 110., 18.3503 66, 114.7767, 17.7824 67, 119.5534, 19.8569 68, 124.2259, 20.8643 69, 128.6882, 20.5012 70, 132.2826, 18.4378 71, 134.7612, 15.401 72, 137.354, 8.03714 73, 137.8012, 4.04762 74, 144.8265, 4.65146 75, 144.3889, 9.49225 76, 137.5026, 17.175 77, 134.1037, 20.3423 78, 129.5284, 22.3786 79, 124.3888, 22.9216 80, 119.3783, 22.0249 81, 114.65, 20.0485 82, 140.7527, 8.70145 83, 141.1813, 4.32418 *Element, type=CAX4H,elset=tire 51, 51, 58, 76, 71 52, 58, 52, 59, 76 53, 71, 76, 77, 70 54, 76, 59, 60, 77 55, 70, 77, 78, 69 56, 77, 60, 61, 78 57, 69, 78, 79, 68 58, 78, 61, 62, 79 59, 68, 79, 80, 67 60, 79, 62, 63, 80 61, 67, 80, 81, 66 62, 80, 63, 64, 81 63, 66, 81, 65, 54 64, 81, 64, 53, 65 65, 52, 58, 82, 75 66, 58, 51, 72, 82 67, 75, 82, 83, 74 68, 82, 72, 73, 83 69, 74, 83, 55, 57 70, 83, 73, 56, 55 *Solid Section, elset=tire, material=rubber 1., *NSET,NSET=longlongnout 53 , 54, 65, 69, 70 *nset,nset=cload 60, *NSET,NSET=nout 1, 2, 7, 8, 9, 10, 21 *Nset, nset=SYMS 55, 56, 57 *Nset, nset=CENT 53, 54, 65 *NSET,NSET=SYMA 7 *Elset, elset=air_S2 17, 18, 19 *Elset, elset=air_S1, generate 1, 4, 1 *Surface, type=ELEMENT, name=air air_S2, S2 air_S1, S1 *Elset, elset=liner_S4, generate 51, 63, 2 *Elset, elset=liner_S2, generate 66, 70, 2 *Surface, type=ELEMENT, name=liner liner_S4, S4 liner_S2, S2 ** Constraint: air-liner *Tie, name=air_liner, adjust=no air, liner ** *Material, name=air *Acoustic Medium 14.2E3, *Density 1.2e-3, *Material, name=rubber *Hyperelastic 100., 0., 1.D-8 *Density 1.1e-3, *Surface Interaction, name=air_liner 1., ** ** ---------------------------------------------------------------- ** *nset,nset=retained,unsorted 53,54,56,57 *STEP,nlgeom *STATIC *END STEP *STEP *FREQUENCY,norm=mass 65,,,-1 *BOUNDARY,op=new retained,1,2 *OUTPUT,FIELD *NODE OUTPUT U, *END STEP ** ---------------------------------------------------------------- *step *substructure generate,type=z1,overwrite,libr=smalltire_acax4, recovery matrix=yes, mass matrix=yes *boundary,op=new *retained nodal dofs,sorted=no retained, *select eigenmodes,generate 1,65,1 *substructure load case,name=loadcase1 *cload cload,1,0.1 *substructure matrix output, stiffness=yes,file=smalltire_acax4, mass=yes, recovery=yes,sload=yes *end step ********************************************